This paper analyzed the problems related to the large vibrating screen directly driven by ordinary motor, and raised the idea of using hydrauliccontrol system to tackle the problems.
分析了在大型筛机上采用普通电机直接驱动激振器方法所存在的问题，提出用液压控制系统解决问题的方案。
2
This paper deals with a closed-loop digital control for a hydraulic valve, controlled motor speed system.
研究了用位总线微机构成的液压阀控马达速度闭环数字控制系统。
3
The model of hydraulicmotor pump variable speed control system is built.